<template>
    <div>
       <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>参数列表</el-breadcrumb-item>
    </el-breadcrumb> 
    <!-- 卡片视图区 -->
    <el-card>
        <!-- 警告区域 -->
         <el-alert
            title="只允许为第三级分类设置相关参数"
            type="warning"
            show-icon
            :closable="false">
        </el-alert>
        <!-- 选择商品分类区 -->
        <el-row style="margin-top:10px;">
            <el-row>
                <span>选择商品分类：</span>
         <!-- 选择商品分类的级联选择框 -->
         <el-cascader
            v-model="selectedCateKeys"
            :options="catelist"
            :props="cateProps"
            @change="handleChange"></el-cascader>
            </el-row>
        </el-row>
        <!-- tab页签区域 -->
        <el-tabs v-model="activeName" @tab-click="handleTabClick">
            <!-- 添加动态参数的面板 -->
            <el-tab-pane label="动态参数" name="many">
                <el-button type="primary" size="mini" :disabled="isBtnDisabled"
                @click="addDialogVisible=true">添加参数</el-button>
                <!-- 动态参数表格 -->
                <el-table :data ="manyTabData" border stripe>
                    <!-- 展开行 -->
                     <el-table-column type="expand">
                         <template slot-scope="scope">
                             <!-- 循环渲染tag标签 -->
                        <el-tag  style="margin-left:10px;" v-for="(item,i) in scope.row.attr_vals" :key="i"
                        @close ="handleClose(i,scope.row)">{{item}}</el-tag>                                     
                            <!-- 输入的文本框-->
                            <el-input
                            class="input-new-tag"
                            v-if="scope.row.inputVisible"
                            v-model="scope.row.inputValue"
                            ref="saveTagInput"
                            size="small"
                            @keyup.enter.native="handleInputConfirm(scope.row)"
                            @blur="handleInputConfirm(scope.row)"
                            closable
                            >
                            </el-input>
                            <!-- 添加按钮 -->
                            <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>

                         </template>
                     </el-table-column>
                    <!-- 索引列 -->
                    <el-table-column type="index"></el-table-column>
                     <el-table-column label="参数名称" prop="attr_name"></el-table-column>
                     <el-table-column label="操作" >
                         <template slot-scope="scope">
                            <el-button type="primary" size="mini" icon="el-icon-edit"
                             @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                            <el-button type="primary" size="mini" icon="el-icon-delete" @click="removeParams(scope.row.attr_id)">删除</el-button>
                         </template>
                     </el-table-column>
                </el-table>
            </el-tab-pane>
            <!-- 添加静态属性的面板 -->
            <el-tab-pane label="静态属性" name="only">
                <el-button type="primary" size="mini" :disabled="isBtnDisabled"
                @click="addDialogVisible=true">
                    添加属性
                </el-button>
                 <!-- 添加静态面板 -->
              <el-table :data ="onlyTabData" border stripe>
                    <!-- 展开行 -->
                     <el-table-column type="expand">
                          <template slot-scope="scope">
                             <!-- 循环渲染tag标签 -->
                        <el-tag  style="margin-left:10px;" v-for="(item,i) in scope.row.attr_vals" :key="i"
                        @close ="handleClose(i,scope.row)">{{item}}</el-tag>                                     
                            <!-- 输入的文本框-->
                            <el-input
                            class="input-new-tag"
                            v-if="scope.row.inputVisible"
                            v-model="scope.row.inputValue"
                            ref="saveTagInput"
                            size="small"
                            @keyup.enter.native="handleInputConfirm(scope.row)"
                            @blur="handleInputConfirm(scope.row)"
                            closable
                            >
                            </el-input>
                            <!-- 添加按钮 -->
                            <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>

                         </template>
                     </el-table-column>
                    <!-- 索引列 -->
                    <el-table-column type="index"></el-table-column>
                     <el-table-column label="属性名称" prop="attr_name"></el-table-column>
                     <el-table-column label="操作">
                         <template >
                            <el-button type="primary" size="mini" icon="el-icon-edit" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                            <el-button type="primary" size="mini" icon="el-icon-delete" @click="removeParams(scope.row.attr_id)">删除</el-button>
                         </template>
                     </el-table-column>
                </el-table>
            </el-tab-pane>
        </el-tabs>
    </el-card>
    <!-- 添加参数的对话框 -->
    <el-dialog
  :title="'添加'+titleText"
  :visible.sync="addDialogVisible"
  width="50%" 
  @close="addDialogClosed">
  <!-- form表单 -->
  <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" >
  <el-form-item :label="titleText" prop="attr_name">
    <el-input v-model="addForm.attr_name"></el-input>
  <span  class="dialog-footer">
    <el-button @click="addDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="addParams">确 定</el-button>
  </span>
  </el-form-item>
  </el-form>
</el-dialog>
    <!-- 修改参数对话框 -->
        <el-dialog
  :title="'修改'+titleText"
  :visible.sync="editDialogVisible"
  width="50%" 
  @close="editDialogClosed">
  <!-- form表单 -->
  <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px" >
  <el-form-item :label="titleText" prop="attr_name">
    <el-input v-model="editForm.attr_name"></el-input>
  <span  class="dialog-footer">
    <el-button @click="editDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="editParams">确 定</el-button>
  </span>
  </el-form-item>
  </el-form>
</el-dialog>
    </div>
</template>
<script>
export default {
    data(){
        return{
            catelist:[],
            // 级联选择框的选择属性
            cateProps:{
                value:'cat_id',
                label:'cat_name',
                children:'children'
            },
            // 级联选择框双向绑定到的数组
            selectedCateKeys:[],
            // 被激活的页签
            activeName:'many',
            // 动态属性的数据
            manyTabData:[],
            // 静态属性的数据
            onlyTabData:[],
            // 控制添加对话框的显示和隐藏
            addDialogVisible:false,
            // 添加参数的表单对象
            addForm:{
                attr_name:''
            },
            // 添加表单的验证规则对象
            addFormRules:{
                  attr_name: [
                  { required: true, message: '请输入参数名称', trigger: 'blur' }
             ]
            },
            // 显示编辑对话框
            editDialogVisible:false,
            // 修改的表单数据对象
            editForm:{},
            // 编辑表单的验证规则对象
            editFormRules:{
                  attr_name: [
                  { required: true, message: '请输入参数名称', trigger: 'blur' }
             ]
            },
            // 控制按钮与文本框的显示隐藏
            inputVisible:false,
            // 双向绑定输入的内容
            inputValue:''

        }
    },
    created(){
        this.getCateList()
    },
    methods:{
    // 获取所有的商品分类列表
     async  getCateList(){
      const {data:res} = await this.$http.get('categories')
      if(res.meta.status !== 200){
          return this.$message.error('获取商品分类失败!')
      }
      this.catelist = res.data
      console.log(this.catelist);
        },
     handleChange(){
       this.getParamsData();

     },
     // 获取参数的列表数据
  async  getParamsData(){
         // console.log(this.selectedCateKeys)
        if(this.selectedCateKeys.length !==3){
            this.selectedCateKeys =[]
            this.manyTabData =[]
            this.onlyTabData=[]
            return
        }
        // 证明选中的是三级分类
        console.log(this.selectedCateKeys)
        // 根据所选分类的ID，和当前所处的面板，获取对应的请求参数
     const{data:res} = await  this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:this.activeName}})
     if(res.meta.status !== 200){
         return this.$message.error('获取参数列表失败')
     }
     res.data.forEach(item =>{
       item.attr_vals = item.attr_vals.split('')
     //  item.attr_vals = item.attr_vals
         // 控制文本框的显示与隐藏
         item.inputVisible = false
         // 文本框中输入的值
         item.inputVisible =''
     })
     console.log(res);
     if(this.activeName==='many'){
         this.manyTabData = res.data
         console.log(this.manyTabData);
     }else{
         this.onlyTabData = res.data
         console.log(this.onlyTabData)
     }
    },
     // Tab页签点击事件的处理函数
     handleTabClick(){
         console.log(this.activeName);
         this.getParamsData();
     },
     // 监听添加对话框的关闭事件
     addDialogClosed(){
         this.$refs.addFormRef.resetFields();
     },
     // 添加参数
     addParams(){
         this.$refs.addFormRef.validate(async valid=>{
             if(!valid) return
           const {data:res} = await this.$http.post(`categories/${this.cateId}/attributes`,{
                 attr_name:this.addForm.attr_name,
                 attr_sel: this.activeName

             })
             console.log(res);
             if(res.meta.status !==201){
                 return this.$message.error('添加参数失败！')
             }
             this.$message.success('添加参数成功!')
             this.addDialogVisible = false;
             this.getParamsData()
         })
     },
     // 点击按钮 展示修改对话框
   async  showEditDialog(attr_id){
      const{data:res} = await this.$http.get(`categories/${this.cateId}/attributes/${attr_id}`,{params:{attr_sel:this.activeName}})
       console.log(res);
       if(res.meta.status !== 200){
            this.$message.error('获取信息失败！')
        }
        this.editForm = res.data;
        this.$message.success('获取信息成功！')
        this.editDialogVisible = true;
     },
     // 重置修改对话框
     editDialogClosed(){
         this.$refs.editFormRef.resetFields()
     },
     // 修改参数确认
     editParams(){
         this.$refs.editFormRef.validate( async valid=>{
             if(!valid) return 
         const{data:res} = await this.$http.put(`categories/${this.cateId}/attributes/${this.editForm.attr_id}`,
            {attr_name:this.editForm.attr_name,attr_sel:this.activeName}
           )
           if(res.meta.status !==200) return this.$message.error('修改数据失败')
           this.$message.success('修改参数成功！')
           this.getParamsData()
           this.editDialogVisible = false;
         })
     },
     // 删除参数
    async removeParams(attr_id){
         const confirmResult = await this.$confirm(
        '此操作将永久删除该参数, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)
      // 用户取消了删除操作
    if(confirmResult !== 'confirm'){
        return this.$message.info('已取消删除！')
    }
    // 删除的业务逻辑
    const {data:res}= await this.$http.delete(
        `categories/${this.cateId}/attributes/${attr_id}`
    )
    if(res.meta.status !==200){
        return this.$message.error('删除参数失败!')
    }
    this.$message.success('删除参数成功!')
    this.getParamsData()
     },
     // 文本框失去焦点 或摁下了enter键都会触发
 async    handleInputConfirm(row){
         if(row.inputValue.trim().length ===0){
             row.inputValue =''
             row.inputVisible = false
             return 
         }
         // 如果没有return 则证明输入的内容 需要做后续的处理
         row.attr_vals.push(row.inputValue.trim())
         row.inputValue =''
         row.inputVisible =false
         // 需要发起请求 保存这次操作
         this.saveAttrVals(row)
        
     },
   async  saveAttrVals(row){
          // 需要发起请求 将数据保存到数据库中
       const {data:res} = await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`,
         {attr_name:row.attr_name,
         attr_sel:row.attr_sel,
         attr_vals:row.attr_vals.join('')
         })
         if(res.meta.status !==200){
             return this.$message.error('修改参数失败')
         }
         this.$message.success('修改参数成功')
     },
     // 点击按钮展示文本输入框
     showInput(row){
        row.inputVisible = true;
        // 让文本框自动获得焦点
        // $nextTick 就是当页面被重新选然后 才会指定回调方法
         this.$nextTick(_ => {
          this.$refs.saveTagInput.$refs.input.focus();
        });
     },
     // 删除对应的参数可选项
     handleClose(i,row){
         console.log(i);
         row.attr_vals.splice(i,1);
         this.saveAttrVals(row);
     }
    },
    computed:{
         isBtnDisabled(){
             if(this.selectedCateKeys.length !==3){
                 return true;
             }
             return false;
         },
    
    // 当前选中的三级分类的id
    cateId(){
        if(this.selectedCateKeys.length==3){
            return this.selectedCateKeys[2]
        }
        return null;
    },
    // 动态计算标题的文本
    titleText(){
        if(this.activeName === 'many'){
            return '动态参数';
        }
        return '静态属性'
    }
     }
}
</script>
<style scoped>
.dialog-footer{
    float:right;
    display:block;
    margin-top:10px;
}
.dialog-footer::after{
    content:'';
    clear:both;
    display: block;
}
.input-new-tag{
    width:100px;
    margin-left:10px;
}
</style>